./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35cb1c11-643e-46da-8804-892c7204f1be/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35cb1c11-643e-46da-8804-892c7204f1be/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35cb1c11-643e-46da-8804-892c7204f1be/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35cb1c11-643e-46da-8804-892c7204f1be/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35cb1c11-643e-46da-8804-892c7204f1be/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35cb1c11-643e-46da-8804-892c7204f1be/bin/utaipan-eEHZpOm5b7 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0ed6e4196d49d75b29a7ddd297e9986c08c6bd65f18221f72f78571f381f483e --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 17:56:08,309 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 17:56:08,312 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 17:56:08,366 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 17:56:08,367 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 17:56:08,371 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 17:56:08,373 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 17:56:08,376 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 17:56:08,379 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 17:56:08,385 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 17:56:08,386 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 17:56:08,388 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 17:56:08,388 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 17:56:08,391 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 17:56:08,393 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 17:56:08,398 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 17:56:08,400 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 17:56:08,401 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 17:56:08,403 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 17:56:08,411 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 17:56:08,413 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 17:56:08,414 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 17:56:08,417 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 17:56:08,418 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 17:56:08,427 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 17:56:08,428 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 17:56:08,428 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 17:56:08,430 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 17:56:08,431 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 17:56:08,432 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 17:56:08,432 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 17:56:08,433 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 17:56:08,435 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 17:56:08,436 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 17:56:08,438 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 17:56:08,438 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 17:56:08,439 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 17:56:08,439 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 17:56:08,439 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 17:56:08,440 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 17:56:08,441 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 17:56:08,442 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35cb1c11-643e-46da-8804-892c7204f1be/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 17:56:08,487 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 17:56:08,487 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 17:56:08,488 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 17:56:08,488 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 17:56:08,489 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 17:56:08,489 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 17:56:08,490 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 17:56:08,490 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 17:56:08,490 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 17:56:08,490 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 17:56:08,491 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 17:56:08,491 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 17:56:08,491 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 17:56:08,492 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 17:56:08,492 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 17:56:08,492 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 17:56:08,492 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 17:56:08,492 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 17:56:08,493 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 17:56:08,493 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 17:56:08,494 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 17:56:08,494 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 17:56:08,494 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 17:56:08,494 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 17:56:08,494 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 17:56:08,494 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 17:56:08,496 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 17:56:08,496 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 17:56:08,496 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 17:56:08,496 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 17:56:08,497 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 17:56:08,497 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 17:56:08,497 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 17:56:08,497 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 17:56:08,498 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 17:56:08,498 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 17:56:08,498 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 17:56:08,498 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 17:56:08,498 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 17:56:08,499 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 17:56:08,499 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 17:56:08,499 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35cb1c11-643e-46da-8804-892c7204f1be/bin/utaipan-eEHZpOm5b7/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35cb1c11-643e-46da-8804-892c7204f1be/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0ed6e4196d49d75b29a7ddd297e9986c08c6bd65f18221f72f78571f381f483e [2021-11-25 17:56:08,794 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 17:56:08,814 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 17:56:08,817 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 17:56:08,818 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 17:56:08,819 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 17:56:08,820 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35cb1c11-643e-46da-8804-892c7204f1be/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2021-11-25 17:56:08,886 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35cb1c11-643e-46da-8804-892c7204f1be/bin/utaipan-eEHZpOm5b7/data/65ee9a6c0/e3f6173df7fb417b8a260a9bca5a0cb1/FLAGaf3b9b12d [2021-11-25 17:56:09,593 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 17:56:09,594 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35cb1c11-643e-46da-8804-892c7204f1be/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2021-11-25 17:56:09,618 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35cb1c11-643e-46da-8804-892c7204f1be/bin/utaipan-eEHZpOm5b7/data/65ee9a6c0/e3f6173df7fb417b8a260a9bca5a0cb1/FLAGaf3b9b12d [2021-11-25 17:56:09,889 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35cb1c11-643e-46da-8804-892c7204f1be/bin/utaipan-eEHZpOm5b7/data/65ee9a6c0/e3f6173df7fb417b8a260a9bca5a0cb1 [2021-11-25 17:56:09,892 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 17:56:09,893 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 17:56:09,895 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 17:56:09,895 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 17:56:09,898 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 17:56:09,899 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:56:09" (1/1) ... [2021-11-25 17:56:09,900 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b684d97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:56:09, skipping insertion in model container [2021-11-25 17:56:09,901 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:56:09" (1/1) ... [2021-11-25 17:56:09,908 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 17:56:10,005 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 17:56:10,300 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35cb1c11-643e-46da-8804-892c7204f1be/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c[8637,8650] [2021-11-25 17:56:10,346 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35cb1c11-643e-46da-8804-892c7204f1be/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c[15862,15875] [2021-11-25 17:56:10,361 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35cb1c11-643e-46da-8804-892c7204f1be/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c[18059,18072] [2021-11-25 17:56:10,369 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35cb1c11-643e-46da-8804-892c7204f1be/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c[19083,19096] [2021-11-25 17:56:10,586 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 17:56:10,598 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 17:56:10,672 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35cb1c11-643e-46da-8804-892c7204f1be/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c[8637,8650] [2021-11-25 17:56:10,734 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35cb1c11-643e-46da-8804-892c7204f1be/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c[15862,15875] [2021-11-25 17:56:10,756 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35cb1c11-643e-46da-8804-892c7204f1be/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c[18059,18072] [2021-11-25 17:56:10,767 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35cb1c11-643e-46da-8804-892c7204f1be/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c[19083,19096] [2021-11-25 17:56:11,039 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 17:56:11,068 INFO L208 MainTranslator]: Completed translation [2021-11-25 17:56:11,068 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:56:11 WrapperNode [2021-11-25 17:56:11,069 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 17:56:11,070 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 17:56:11,070 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 17:56:11,070 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 17:56:11,078 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:56:11" (1/1) ... [2021-11-25 17:56:11,104 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:56:11" (1/1) ... [2021-11-25 17:56:11,269 INFO L137 Inliner]: procedures = 22, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 2592 [2021-11-25 17:56:11,270 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 17:56:11,271 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 17:56:11,271 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 17:56:11,271 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 17:56:11,281 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:56:11" (1/1) ... [2021-11-25 17:56:11,282 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:56:11" (1/1) ... [2021-11-25 17:56:11,295 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:56:11" (1/1) ... [2021-11-25 17:56:11,296 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:56:11" (1/1) ... [2021-11-25 17:56:11,330 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:56:11" (1/1) ... [2021-11-25 17:56:11,347 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:56:11" (1/1) ... [2021-11-25 17:56:11,369 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:56:11" (1/1) ... [2021-11-25 17:56:11,389 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 17:56:11,391 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 17:56:11,392 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 17:56:11,392 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 17:56:11,393 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:56:11" (1/1) ... [2021-11-25 17:56:11,401 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 17:56:11,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35cb1c11-643e-46da-8804-892c7204f1be/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:56:11,432 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35cb1c11-643e-46da-8804-892c7204f1be/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 17:56:11,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35cb1c11-643e-46da-8804-892c7204f1be/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 17:56:11,481 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 17:56:11,481 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 17:56:11,481 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 17:56:11,481 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 17:56:11,730 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 17:56:11,732 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 17:56:13,280 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 17:56:13,437 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 17:56:13,437 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-25 17:56:13,445 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:56:13 BoogieIcfgContainer [2021-11-25 17:56:13,445 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 17:56:13,446 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 17:56:13,447 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 17:56:13,450 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 17:56:13,450 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 05:56:09" (1/3) ... [2021-11-25 17:56:13,451 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@633dd467 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:56:13, skipping insertion in model container [2021-11-25 17:56:13,451 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:56:11" (2/3) ... [2021-11-25 17:56:13,451 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@633dd467 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:56:13, skipping insertion in model container [2021-11-25 17:56:13,451 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:56:13" (3/3) ... [2021-11-25 17:56:13,453 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2021-11-25 17:56:13,460 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 17:56:13,460 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2021-11-25 17:56:13,524 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 17:56:13,531 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 17:56:13,532 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-11-25 17:56:13,571 INFO L276 IsEmpty]: Start isEmpty. Operand has 431 states, 426 states have (on average 1.8568075117370892) internal successors, (791), 430 states have internal predecessors, (791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:56:13,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-25 17:56:13,591 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:56:13,592 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:56:13,592 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 17:56:13,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:56:13,598 INFO L85 PathProgramCache]: Analyzing trace with hash 1875598250, now seen corresponding path program 1 times [2021-11-25 17:56:13,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:56:13,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694493819] [2021-11-25 17:56:13,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:56:13,608 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:56:13,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:56:13,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:56:13,965 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:56:13,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694493819] [2021-11-25 17:56:13,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694493819] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:56:13,966 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:56:13,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 17:56:13,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891503375] [2021-11-25 17:56:13,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:56:13,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 17:56:13,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:56:14,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 17:56:14,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 17:56:14,012 INFO L87 Difference]: Start difference. First operand has 431 states, 426 states have (on average 1.8568075117370892) internal successors, (791), 430 states have internal predecessors, (791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:56:14,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:56:14,199 INFO L93 Difference]: Finished difference Result 651 states and 1142 transitions. [2021-11-25 17:56:14,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 17:56:14,202 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-11-25 17:56:14,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:56:14,227 INFO L225 Difference]: With dead ends: 651 [2021-11-25 17:56:14,227 INFO L226 Difference]: Without dead ends: 524 [2021-11-25 17:56:14,234 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 17:56:14,238 INFO L933 BasicCegarLoop]: 802 mSDtfsCounter, 399 mSDsluCounter, 508 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 399 SdHoareTripleChecker+Valid, 1305 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 17:56:14,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [399 Valid, 1305 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 17:56:14,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2021-11-25 17:56:14,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 518. [2021-11-25 17:56:14,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 518 states, 514 states have (on average 1.3073929961089494) internal successors, (672), 517 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:56:14,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 672 transitions. [2021-11-25 17:56:14,344 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 672 transitions. Word has length 50 [2021-11-25 17:56:14,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:56:14,344 INFO L470 AbstractCegarLoop]: Abstraction has 518 states and 672 transitions. [2021-11-25 17:56:14,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:56:14,346 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 672 transitions. [2021-11-25 17:56:14,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-25 17:56:14,355 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:56:14,355 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:56:14,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 17:56:14,356 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 17:56:14,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:56:14,360 INFO L85 PathProgramCache]: Analyzing trace with hash -2061015356, now seen corresponding path program 1 times [2021-11-25 17:56:14,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:56:14,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520817399] [2021-11-25 17:56:14,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:56:14,363 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:56:14,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:56:14,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:56:14,554 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:56:14,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520817399] [2021-11-25 17:56:14,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520817399] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:56:14,555 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:56:14,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 17:56:14,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140921236] [2021-11-25 17:56:14,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:56:14,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 17:56:14,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:56:14,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 17:56:14,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 17:56:14,564 INFO L87 Difference]: Start difference. First operand 518 states and 672 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:56:14,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:56:14,708 INFO L93 Difference]: Finished difference Result 859 states and 1143 transitions. [2021-11-25 17:56:14,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 17:56:14,709 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-11-25 17:56:14,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:56:14,713 INFO L225 Difference]: With dead ends: 859 [2021-11-25 17:56:14,714 INFO L226 Difference]: Without dead ends: 692 [2021-11-25 17:56:14,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 17:56:14,717 INFO L933 BasicCegarLoop]: 559 mSDtfsCounter, 276 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 912 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 17:56:14,718 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [276 Valid, 912 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 17:56:14,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 692 states. [2021-11-25 17:56:14,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 692 to 685. [2021-11-25 17:56:14,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 685 states, 681 states have (on average 1.3259911894273129) internal successors, (903), 684 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:56:14,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 685 states to 685 states and 903 transitions. [2021-11-25 17:56:14,751 INFO L78 Accepts]: Start accepts. Automaton has 685 states and 903 transitions. Word has length 50 [2021-11-25 17:56:14,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:56:14,751 INFO L470 AbstractCegarLoop]: Abstraction has 685 states and 903 transitions. [2021-11-25 17:56:14,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:56:14,752 INFO L276 IsEmpty]: Start isEmpty. Operand 685 states and 903 transitions. [2021-11-25 17:56:14,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-25 17:56:14,754 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:56:14,755 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:56:14,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 17:56:14,755 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 17:56:14,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:56:14,756 INFO L85 PathProgramCache]: Analyzing trace with hash 2089668058, now seen corresponding path program 1 times [2021-11-25 17:56:14,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:56:14,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805591263] [2021-11-25 17:56:14,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:56:14,757 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:56:14,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:56:14,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:56:14,885 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:56:14,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805591263] [2021-11-25 17:56:14,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805591263] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:56:14,886 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:56:14,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 17:56:14,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241324462] [2021-11-25 17:56:14,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:56:14,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 17:56:14,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:56:14,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 17:56:14,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 17:56:14,892 INFO L87 Difference]: Start difference. First operand 685 states and 903 transitions. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:56:15,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:56:15,292 INFO L93 Difference]: Finished difference Result 1455 states and 1962 transitions. [2021-11-25 17:56:15,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 17:56:15,293 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-11-25 17:56:15,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:56:15,298 INFO L225 Difference]: With dead ends: 1455 [2021-11-25 17:56:15,298 INFO L226 Difference]: Without dead ends: 886 [2021-11-25 17:56:15,305 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-25 17:56:15,308 INFO L933 BasicCegarLoop]: 280 mSDtfsCounter, 1437 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1437 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 17:56:15,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1437 Valid, 360 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 17:56:15,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 886 states. [2021-11-25 17:56:15,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 886 to 880. [2021-11-25 17:56:15,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 880 states, 876 states have (on average 1.3436073059360731) internal successors, (1177), 879 states have internal predecessors, (1177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:56:15,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 1177 transitions. [2021-11-25 17:56:15,378 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 1177 transitions. Word has length 50 [2021-11-25 17:56:15,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:56:15,380 INFO L470 AbstractCegarLoop]: Abstraction has 880 states and 1177 transitions. [2021-11-25 17:56:15,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:56:15,381 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 1177 transitions. [2021-11-25 17:56:15,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-25 17:56:15,383 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:56:15,383 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:56:15,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 17:56:15,384 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 17:56:15,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:56:15,384 INFO L85 PathProgramCache]: Analyzing trace with hash -941949597, now seen corresponding path program 1 times [2021-11-25 17:56:15,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:56:15,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882944584] [2021-11-25 17:56:15,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:56:15,385 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:56:15,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:56:15,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:56:15,458 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:56:15,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882944584] [2021-11-25 17:56:15,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882944584] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:56:15,458 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:56:15,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 17:56:15,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298758392] [2021-11-25 17:56:15,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:56:15,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 17:56:15,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:56:15,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 17:56:15,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 17:56:15,461 INFO L87 Difference]: Start difference. First operand 880 states and 1177 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:56:15,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:56:15,617 INFO L93 Difference]: Finished difference Result 2064 states and 2788 transitions. [2021-11-25 17:56:15,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 17:56:15,618 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-25 17:56:15,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:56:15,626 INFO L225 Difference]: With dead ends: 2064 [2021-11-25 17:56:15,626 INFO L226 Difference]: Without dead ends: 1409 [2021-11-25 17:56:15,627 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 17:56:15,628 INFO L933 BasicCegarLoop]: 544 mSDtfsCounter, 332 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 836 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 17:56:15,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [332 Valid, 836 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 17:56:15,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1409 states. [2021-11-25 17:56:15,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1409 to 1403. [2021-11-25 17:56:15,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1403 states, 1399 states have (on average 1.330950679056469) internal successors, (1862), 1402 states have internal predecessors, (1862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:56:15,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1403 states to 1403 states and 1862 transitions. [2021-11-25 17:56:15,724 INFO L78 Accepts]: Start accepts. Automaton has 1403 states and 1862 transitions. Word has length 51 [2021-11-25 17:56:15,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:56:15,725 INFO L470 AbstractCegarLoop]: Abstraction has 1403 states and 1862 transitions. [2021-11-25 17:56:15,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:56:15,727 INFO L276 IsEmpty]: Start isEmpty. Operand 1403 states and 1862 transitions. [2021-11-25 17:56:15,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-25 17:56:15,729 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:56:15,729 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:56:15,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-25 17:56:15,730 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 17:56:15,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:56:15,730 INFO L85 PathProgramCache]: Analyzing trace with hash -1880466014, now seen corresponding path program 1 times [2021-11-25 17:56:15,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:56:15,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536945350] [2021-11-25 17:56:15,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:56:15,731 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:56:15,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:56:15,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:56:15,808 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:56:15,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536945350] [2021-11-25 17:56:15,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536945350] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:56:15,808 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:56:15,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 17:56:15,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810588995] [2021-11-25 17:56:15,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:56:15,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 17:56:15,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:56:15,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 17:56:15,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 17:56:15,810 INFO L87 Difference]: Start difference. First operand 1403 states and 1862 transitions. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:56:16,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:56:16,245 INFO L93 Difference]: Finished difference Result 3244 states and 4363 transitions. [2021-11-25 17:56:16,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 17:56:16,246 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-25 17:56:16,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:56:16,261 INFO L225 Difference]: With dead ends: 3244 [2021-11-25 17:56:16,261 INFO L226 Difference]: Without dead ends: 2012 [2021-11-25 17:56:16,264 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-25 17:56:16,265 INFO L933 BasicCegarLoop]: 235 mSDtfsCounter, 1295 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1295 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 17:56:16,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1295 Valid, 318 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 17:56:16,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2012 states. [2021-11-25 17:56:16,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2012 to 2006. [2021-11-25 17:56:16,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2006 states, 2002 states have (on average 1.3406593406593406) internal successors, (2684), 2005 states have internal predecessors, (2684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:56:16,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2006 states to 2006 states and 2684 transitions. [2021-11-25 17:56:16,448 INFO L78 Accepts]: Start accepts. Automaton has 2006 states and 2684 transitions. Word has length 51 [2021-11-25 17:56:16,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:56:16,449 INFO L470 AbstractCegarLoop]: Abstraction has 2006 states and 2684 transitions. [2021-11-25 17:56:16,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:56:16,449 INFO L276 IsEmpty]: Start isEmpty. Operand 2006 states and 2684 transitions. [2021-11-25 17:56:16,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-25 17:56:16,451 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:56:16,452 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:56:16,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-25 17:56:16,452 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 17:56:16,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:56:16,453 INFO L85 PathProgramCache]: Analyzing trace with hash -1402460387, now seen corresponding path program 1 times [2021-11-25 17:56:16,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:56:16,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745609499] [2021-11-25 17:56:16,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:56:16,454 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:56:16,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:56:16,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:56:16,517 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:56:16,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745609499] [2021-11-25 17:56:16,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745609499] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:56:16,517 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:56:16,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 17:56:16,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509129164] [2021-11-25 17:56:16,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:56:16,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 17:56:16,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:56:16,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 17:56:16,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 17:56:16,520 INFO L87 Difference]: Start difference. First operand 2006 states and 2684 transitions. Second operand has 5 states, 5 states have (on average 10.4) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:56:17,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:56:17,017 INFO L93 Difference]: Finished difference Result 4967 states and 6703 transitions. [2021-11-25 17:56:17,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 17:56:17,018 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-25 17:56:17,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:56:17,037 INFO L225 Difference]: With dead ends: 4967 [2021-11-25 17:56:17,037 INFO L226 Difference]: Without dead ends: 3132 [2021-11-25 17:56:17,041 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-25 17:56:17,042 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 1183 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1183 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 17:56:17,042 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1183 Valid, 276 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 17:56:17,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3132 states. [2021-11-25 17:56:17,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3132 to 3125. [2021-11-25 17:56:17,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3125 states, 3121 states have (on average 1.3389939122076258) internal successors, (4179), 3124 states have internal predecessors, (4179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:56:17,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3125 states to 3125 states and 4179 transitions. [2021-11-25 17:56:17,347 INFO L78 Accepts]: Start accepts. Automaton has 3125 states and 4179 transitions. Word has length 52 [2021-11-25 17:56:17,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:56:17,347 INFO L470 AbstractCegarLoop]: Abstraction has 3125 states and 4179 transitions. [2021-11-25 17:56:17,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:56:17,348 INFO L276 IsEmpty]: Start isEmpty. Operand 3125 states and 4179 transitions. [2021-11-25 17:56:17,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-25 17:56:17,350 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:56:17,351 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:56:17,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-25 17:56:17,351 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 17:56:17,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:56:17,352 INFO L85 PathProgramCache]: Analyzing trace with hash -78307905, now seen corresponding path program 1 times [2021-11-25 17:56:17,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:56:17,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35727432] [2021-11-25 17:56:17,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:56:17,352 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:56:17,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:56:17,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:56:17,430 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:56:17,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35727432] [2021-11-25 17:56:17,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35727432] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:56:17,431 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:56:17,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 17:56:17,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015914476] [2021-11-25 17:56:17,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:56:17,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 17:56:17,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:56:17,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 17:56:17,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-25 17:56:17,433 INFO L87 Difference]: Start difference. First operand 3125 states and 4179 transitions. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:56:18,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:56:18,776 INFO L93 Difference]: Finished difference Result 10420 states and 14089 transitions. [2021-11-25 17:56:18,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-25 17:56:18,776 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-25 17:56:18,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:56:18,828 INFO L225 Difference]: With dead ends: 10420 [2021-11-25 17:56:18,828 INFO L226 Difference]: Without dead ends: 9237 [2021-11-25 17:56:18,832 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-11-25 17:56:18,833 INFO L933 BasicCegarLoop]: 218 mSDtfsCounter, 2233 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2233 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 17:56:18,833 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2233 Valid, 519 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 367 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 17:56:18,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9237 states. [2021-11-25 17:56:19,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9237 to 3139. [2021-11-25 17:56:19,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3139 states, 3135 states have (on average 1.338755980861244) internal successors, (4197), 3138 states have internal predecessors, (4197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:56:19,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3139 states to 3139 states and 4197 transitions. [2021-11-25 17:56:19,202 INFO L78 Accepts]: Start accepts. Automaton has 3139 states and 4197 transitions. Word has length 53 [2021-11-25 17:56:19,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:56:19,203 INFO L470 AbstractCegarLoop]: Abstraction has 3139 states and 4197 transitions. [2021-11-25 17:56:19,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:56:19,203 INFO L276 IsEmpty]: Start isEmpty. Operand 3139 states and 4197 transitions. [2021-11-25 17:56:19,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-25 17:56:19,206 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:56:19,206 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:56:19,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-25 17:56:19,206 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 17:56:19,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:56:19,207 INFO L85 PathProgramCache]: Analyzing trace with hash -1272319552, now seen corresponding path program 1 times [2021-11-25 17:56:19,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:56:19,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544773620] [2021-11-25 17:56:19,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:56:19,207 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:56:19,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:56:19,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:56:19,320 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:56:19,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544773620] [2021-11-25 17:56:19,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544773620] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:56:19,320 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:56:19,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 17:56:19,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634876027] [2021-11-25 17:56:19,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:56:19,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 17:56:19,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:56:19,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 17:56:19,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-25 17:56:19,322 INFO L87 Difference]: Start difference. First operand 3139 states and 4197 transitions. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:56:21,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:56:21,092 INFO L93 Difference]: Finished difference Result 11420 states and 15569 transitions. [2021-11-25 17:56:21,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-25 17:56:21,093 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-25 17:56:21,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:56:21,151 INFO L225 Difference]: With dead ends: 11420 [2021-11-25 17:56:21,152 INFO L226 Difference]: Without dead ends: 10408 [2021-11-25 17:56:21,156 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-11-25 17:56:21,156 INFO L933 BasicCegarLoop]: 238 mSDtfsCounter, 1711 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1711 SdHoareTripleChecker+Valid, 614 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 17:56:21,157 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1711 Valid, 614 Invalid, 671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 517 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-25 17:56:21,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10408 states. [2021-11-25 17:56:21,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10408 to 3161. [2021-11-25 17:56:21,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3161 states, 3157 states have (on average 1.3392461197339247) internal successors, (4228), 3160 states have internal predecessors, (4228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:56:21,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3161 states to 3161 states and 4228 transitions. [2021-11-25 17:56:21,622 INFO L78 Accepts]: Start accepts. Automaton has 3161 states and 4228 transitions. Word has length 53 [2021-11-25 17:56:21,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:56:21,623 INFO L470 AbstractCegarLoop]: Abstraction has 3161 states and 4228 transitions. [2021-11-25 17:56:21,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:56:21,623 INFO L276 IsEmpty]: Start isEmpty. Operand 3161 states and 4228 transitions. [2021-11-25 17:56:21,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-25 17:56:21,626 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:56:21,626 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:56:21,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-25 17:56:21,626 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 17:56:21,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:56:21,627 INFO L85 PathProgramCache]: Analyzing trace with hash 1821294495, now seen corresponding path program 1 times [2021-11-25 17:56:21,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:56:21,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786816634] [2021-11-25 17:56:21,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:56:21,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:56:21,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:56:21,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:56:21,700 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:56:21,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786816634] [2021-11-25 17:56:21,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786816634] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:56:21,700 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:56:21,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 17:56:21,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124123325] [2021-11-25 17:56:21,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:56:21,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 17:56:21,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:56:21,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 17:56:21,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-25 17:56:21,702 INFO L87 Difference]: Start difference. First operand 3161 states and 4228 transitions. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:56:23,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:56:23,546 INFO L93 Difference]: Finished difference Result 13686 states and 18637 transitions. [2021-11-25 17:56:23,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-25 17:56:23,547 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-25 17:56:23,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:56:23,582 INFO L225 Difference]: With dead ends: 13686 [2021-11-25 17:56:23,582 INFO L226 Difference]: Without dead ends: 12556 [2021-11-25 17:56:23,587 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-11-25 17:56:23,588 INFO L933 BasicCegarLoop]: 216 mSDtfsCounter, 2562 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2562 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 17:56:23,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2562 Valid, 553 Invalid, 592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 421 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-25 17:56:23,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12556 states. [2021-11-25 17:56:24,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12556 to 3195. [2021-11-25 17:56:24,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3195 states, 3191 states have (on average 1.3387652773425258) internal successors, (4272), 3194 states have internal predecessors, (4272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:56:24,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3195 states to 3195 states and 4272 transitions. [2021-11-25 17:56:24,130 INFO L78 Accepts]: Start accepts. Automaton has 3195 states and 4272 transitions. Word has length 53 [2021-11-25 17:56:24,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:56:24,131 INFO L470 AbstractCegarLoop]: Abstraction has 3195 states and 4272 transitions. [2021-11-25 17:56:24,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:56:24,131 INFO L276 IsEmpty]: Start isEmpty. Operand 3195 states and 4272 transitions. [2021-11-25 17:56:24,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-25 17:56:24,134 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:56:24,134 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:56:24,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-25 17:56:24,134 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 17:56:24,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:56:24,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1007743463, now seen corresponding path program 1 times [2021-11-25 17:56:24,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:56:24,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101982100] [2021-11-25 17:56:24,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:56:24,135 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:56:24,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:56:24,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:56:24,278 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:56:24,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101982100] [2021-11-25 17:56:24,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101982100] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:56:24,279 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:56:24,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 17:56:24,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789126002] [2021-11-25 17:56:24,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:56:24,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 17:56:24,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:56:24,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 17:56:24,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-25 17:56:24,280 INFO L87 Difference]: Start difference. First operand 3195 states and 4272 transitions. Second operand has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:56:25,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:56:25,467 INFO L93 Difference]: Finished difference Result 7587 states and 10246 transitions. [2021-11-25 17:56:25,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-25 17:56:25,468 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-25 17:56:25,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:56:25,478 INFO L225 Difference]: With dead ends: 7587 [2021-11-25 17:56:25,479 INFO L226 Difference]: Without dead ends: 5391 [2021-11-25 17:56:25,482 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-11-25 17:56:25,483 INFO L933 BasicCegarLoop]: 238 mSDtfsCounter, 1511 mSDsluCounter, 507 mSDsCounter, 0 mSdLazyCounter, 651 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1511 SdHoareTripleChecker+Valid, 745 SdHoareTripleChecker+Invalid, 676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 17:56:25,483 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1511 Valid, 745 Invalid, 676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 651 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-25 17:56:25,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5391 states. [2021-11-25 17:56:25,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5391 to 3114. [2021-11-25 17:56:25,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3114 states, 3110 states have (on average 1.337299035369775) internal successors, (4159), 3113 states have internal predecessors, (4159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:56:25,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3114 states to 3114 states and 4159 transitions. [2021-11-25 17:56:25,931 INFO L78 Accepts]: Start accepts. Automaton has 3114 states and 4159 transitions. Word has length 54 [2021-11-25 17:56:25,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:56:25,932 INFO L470 AbstractCegarLoop]: Abstraction has 3114 states and 4159 transitions. [2021-11-25 17:56:25,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:56:25,932 INFO L276 IsEmpty]: Start isEmpty. Operand 3114 states and 4159 transitions. [2021-11-25 17:56:25,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-25 17:56:25,934 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:56:25,934 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:56:25,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-25 17:56:25,935 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 17:56:25,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:56:25,935 INFO L85 PathProgramCache]: Analyzing trace with hash -649389773, now seen corresponding path program 1 times [2021-11-25 17:56:25,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:56:25,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642820462] [2021-11-25 17:56:25,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:56:25,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:56:25,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:56:26,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:56:26,054 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:56:26,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642820462] [2021-11-25 17:56:26,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642820462] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:56:26,054 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:56:26,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-25 17:56:26,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212094508] [2021-11-25 17:56:26,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:56:26,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 17:56:26,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:56:26,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 17:56:26,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-25 17:56:26,056 INFO L87 Difference]: Start difference. First operand 3114 states and 4159 transitions. Second operand has 8 states, 8 states have (on average 6.75) internal successors, (54), 7 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:56:27,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:56:27,636 INFO L93 Difference]: Finished difference Result 8579 states and 11548 transitions. [2021-11-25 17:56:27,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-25 17:56:27,640 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 7 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-25 17:56:27,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:56:27,655 INFO L225 Difference]: With dead ends: 8579 [2021-11-25 17:56:27,655 INFO L226 Difference]: Without dead ends: 6525 [2021-11-25 17:56:27,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-11-25 17:56:27,661 INFO L933 BasicCegarLoop]: 300 mSDtfsCounter, 889 mSDsluCounter, 1027 mSDsCounter, 0 mSdLazyCounter, 1122 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 889 SdHoareTripleChecker+Valid, 1327 SdHoareTripleChecker+Invalid, 1166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-25 17:56:27,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [889 Valid, 1327 Invalid, 1166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1122 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-25 17:56:27,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6525 states. [2021-11-25 17:56:28,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6525 to 3085. [2021-11-25 17:56:28,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3085 states, 3081 states have (on average 1.3365790327815645) internal successors, (4118), 3084 states have internal predecessors, (4118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:56:28,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3085 states to 3085 states and 4118 transitions. [2021-11-25 17:56:28,163 INFO L78 Accepts]: Start accepts. Automaton has 3085 states and 4118 transitions. Word has length 54 [2021-11-25 17:56:28,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:56:28,164 INFO L470 AbstractCegarLoop]: Abstraction has 3085 states and 4118 transitions. [2021-11-25 17:56:28,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 7 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:56:28,164 INFO L276 IsEmpty]: Start isEmpty. Operand 3085 states and 4118 transitions. [2021-11-25 17:56:28,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-25 17:56:28,166 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:56:28,166 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:56:28,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-25 17:56:28,167 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 17:56:28,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:56:28,167 INFO L85 PathProgramCache]: Analyzing trace with hash 2094955992, now seen corresponding path program 1 times [2021-11-25 17:56:28,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:56:28,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519806292] [2021-11-25 17:56:28,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:56:28,168 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:56:28,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:56:28,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:56:28,270 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:56:28,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519806292] [2021-11-25 17:56:28,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519806292] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:56:28,270 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:56:28,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-25 17:56:28,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612268087] [2021-11-25 17:56:28,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:56:28,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 17:56:28,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:56:28,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 17:56:28,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-25 17:56:28,272 INFO L87 Difference]: Start difference. First operand 3085 states and 4118 transitions. Second operand has 8 states, 8 states have (on average 6.75) internal successors, (54), 7 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:56:29,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:56:29,609 INFO L93 Difference]: Finished difference Result 6418 states and 8596 transitions. [2021-11-25 17:56:29,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-25 17:56:29,610 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 7 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-25 17:56:29,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:56:29,622 INFO L225 Difference]: With dead ends: 6418 [2021-11-25 17:56:29,623 INFO L226 Difference]: Without dead ends: 6413 [2021-11-25 17:56:29,624 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2021-11-25 17:56:29,625 INFO L933 BasicCegarLoop]: 263 mSDtfsCounter, 1363 mSDsluCounter, 815 mSDsCounter, 0 mSdLazyCounter, 925 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1363 SdHoareTripleChecker+Valid, 1078 SdHoareTripleChecker+Invalid, 974 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 925 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 17:56:29,625 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1363 Valid, 1078 Invalid, 974 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 925 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-25 17:56:29,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6413 states. [2021-11-25 17:56:30,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6413 to 3085. [2021-11-25 17:56:30,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3085 states, 3081 states have (on average 1.335929892891918) internal successors, (4116), 3084 states have internal predecessors, (4116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:56:30,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3085 states to 3085 states and 4116 transitions. [2021-11-25 17:56:30,105 INFO L78 Accepts]: Start accepts. Automaton has 3085 states and 4116 transitions. Word has length 54 [2021-11-25 17:56:30,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:56:30,105 INFO L470 AbstractCegarLoop]: Abstraction has 3085 states and 4116 transitions. [2021-11-25 17:56:30,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 7 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:56:30,106 INFO L276 IsEmpty]: Start isEmpty. Operand 3085 states and 4116 transitions. [2021-11-25 17:56:30,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-25 17:56:30,108 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:56:30,108 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:56:30,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-25 17:56:30,109 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 17:56:30,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:56:30,109 INFO L85 PathProgramCache]: Analyzing trace with hash -544921047, now seen corresponding path program 1 times [2021-11-25 17:56:30,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:56:30,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156716308] [2021-11-25 17:56:30,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:56:30,110 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:56:30,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:56:30,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:56:30,153 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:56:30,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156716308] [2021-11-25 17:56:30,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156716308] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:56:30,153 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:56:30,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 17:56:30,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701898911] [2021-11-25 17:56:30,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:56:30,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 17:56:30,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:56:30,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 17:56:30,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 17:56:30,155 INFO L87 Difference]: Start difference. First operand 3085 states and 4116 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:56:30,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:56:30,628 INFO L93 Difference]: Finished difference Result 4229 states and 5663 transitions. [2021-11-25 17:56:30,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 17:56:30,629 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-25 17:56:30,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:56:30,636 INFO L225 Difference]: With dead ends: 4229 [2021-11-25 17:56:30,636 INFO L226 Difference]: Without dead ends: 3092 [2021-11-25 17:56:30,638 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 17:56:30,639 INFO L933 BasicCegarLoop]: 421 mSDtfsCounter, 184 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 678 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 17:56:30,639 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 678 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 17:56:30,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3092 states. [2021-11-25 17:56:31,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3092 to 3085. [2021-11-25 17:56:31,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3085 states, 3081 states have (on average 1.320350535540409) internal successors, (4068), 3084 states have internal predecessors, (4068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:56:31,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3085 states to 3085 states and 4068 transitions. [2021-11-25 17:56:31,105 INFO L78 Accepts]: Start accepts. Automaton has 3085 states and 4068 transitions. Word has length 55 [2021-11-25 17:56:31,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:56:31,105 INFO L470 AbstractCegarLoop]: Abstraction has 3085 states and 4068 transitions. [2021-11-25 17:56:31,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:56:31,106 INFO L276 IsEmpty]: Start isEmpty. Operand 3085 states and 4068 transitions. [2021-11-25 17:56:31,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-25 17:56:31,109 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:56:31,109 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:56:31,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-25 17:56:31,109 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 17:56:31,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:56:31,110 INFO L85 PathProgramCache]: Analyzing trace with hash -171324051, now seen corresponding path program 1 times [2021-11-25 17:56:31,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:56:31,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021649007] [2021-11-25 17:56:31,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:56:31,110 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:56:31,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:56:31,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:56:31,152 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:56:31,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021649007] [2021-11-25 17:56:31,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021649007] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:56:31,152 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:56:31,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 17:56:31,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468542311] [2021-11-25 17:56:31,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:56:31,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 17:56:31,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:56:31,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 17:56:31,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 17:56:31,154 INFO L87 Difference]: Start difference. First operand 3085 states and 4068 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:56:31,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:56:31,596 INFO L93 Difference]: Finished difference Result 4292 states and 5681 transitions. [2021-11-25 17:56:31,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 17:56:31,597 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-25 17:56:31,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:56:31,603 INFO L225 Difference]: With dead ends: 4292 [2021-11-25 17:56:31,603 INFO L226 Difference]: Without dead ends: 3091 [2021-11-25 17:56:31,605 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 17:56:31,606 INFO L933 BasicCegarLoop]: 437 mSDtfsCounter, 200 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 683 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 17:56:31,607 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 683 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 17:56:31,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3091 states. [2021-11-25 17:56:32,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3091 to 3085. [2021-11-25 17:56:32,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3085 states, 3081 states have (on average 1.3060694579681922) internal successors, (4024), 3084 states have internal predecessors, (4024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:56:32,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3085 states to 3085 states and 4024 transitions. [2021-11-25 17:56:32,037 INFO L78 Accepts]: Start accepts. Automaton has 3085 states and 4024 transitions. Word has length 55 [2021-11-25 17:56:32,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:56:32,038 INFO L470 AbstractCegarLoop]: Abstraction has 3085 states and 4024 transitions. [2021-11-25 17:56:32,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:56:32,038 INFO L276 IsEmpty]: Start isEmpty. Operand 3085 states and 4024 transitions. [2021-11-25 17:56:32,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-25 17:56:32,041 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:56:32,041 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:56:32,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-25 17:56:32,041 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 17:56:32,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:56:32,042 INFO L85 PathProgramCache]: Analyzing trace with hash -1692855010, now seen corresponding path program 1 times [2021-11-25 17:56:32,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:56:32,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575105523] [2021-11-25 17:56:32,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:56:32,042 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:56:32,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:56:32,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:56:32,083 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:56:32,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575105523] [2021-11-25 17:56:32,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575105523] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:56:32,083 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:56:32,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 17:56:32,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087344331] [2021-11-25 17:56:32,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:56:32,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 17:56:32,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:56:32,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 17:56:32,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 17:56:32,085 INFO L87 Difference]: Start difference. First operand 3085 states and 4024 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:56:32,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:56:32,503 INFO L93 Difference]: Finished difference Result 4325 states and 5668 transitions. [2021-11-25 17:56:32,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 17:56:32,503 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-25 17:56:32,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:56:32,506 INFO L225 Difference]: With dead ends: 4325 [2021-11-25 17:56:32,506 INFO L226 Difference]: Without dead ends: 3076 [2021-11-25 17:56:32,513 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 17:56:32,516 INFO L933 BasicCegarLoop]: 426 mSDtfsCounter, 220 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 703 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 17:56:32,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 703 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 17:56:32,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3076 states. [2021-11-25 17:56:32,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3076 to 3070. [2021-11-25 17:56:32,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3070 states, 3066 states have (on average 1.2870189171559034) internal successors, (3946), 3069 states have internal predecessors, (3946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:56:32,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3070 states to 3070 states and 3946 transitions. [2021-11-25 17:56:32,976 INFO L78 Accepts]: Start accepts. Automaton has 3070 states and 3946 transitions. Word has length 55 [2021-11-25 17:56:32,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:56:32,976 INFO L470 AbstractCegarLoop]: Abstraction has 3070 states and 3946 transitions. [2021-11-25 17:56:32,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:56:32,977 INFO L276 IsEmpty]: Start isEmpty. Operand 3070 states and 3946 transitions. [2021-11-25 17:56:32,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-25 17:56:32,980 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:56:32,980 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:56:32,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-25 17:56:32,981 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 17:56:32,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:56:32,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1901622388, now seen corresponding path program 1 times [2021-11-25 17:56:32,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:56:32,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065586408] [2021-11-25 17:56:32,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:56:32,982 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:56:33,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:56:33,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:56:33,023 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:56:33,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065586408] [2021-11-25 17:56:33,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065586408] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:56:33,026 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:56:33,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 17:56:33,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562239963] [2021-11-25 17:56:33,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:56:33,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 17:56:33,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:56:33,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 17:56:33,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 17:56:33,028 INFO L87 Difference]: Start difference. First operand 3070 states and 3946 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:56:33,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:56:33,785 INFO L93 Difference]: Finished difference Result 4862 states and 6290 transitions. [2021-11-25 17:56:33,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 17:56:33,785 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-11-25 17:56:33,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:56:33,789 INFO L225 Difference]: With dead ends: 4862 [2021-11-25 17:56:33,790 INFO L226 Difference]: Without dead ends: 3464 [2021-11-25 17:56:33,792 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 17:56:33,792 INFO L933 BasicCegarLoop]: 370 mSDtfsCounter, 286 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 17:56:33,793 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [286 Valid, 487 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 17:56:33,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3464 states. [2021-11-25 17:56:34,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3464 to 2860. [2021-11-25 17:56:34,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2860 states, 2856 states have (on average 1.2843137254901962) internal successors, (3668), 2859 states have internal predecessors, (3668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:56:34,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2860 states to 2860 states and 3668 transitions. [2021-11-25 17:56:34,243 INFO L78 Accepts]: Start accepts. Automaton has 2860 states and 3668 transitions. Word has length 56 [2021-11-25 17:56:34,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:56:34,244 INFO L470 AbstractCegarLoop]: Abstraction has 2860 states and 3668 transitions. [2021-11-25 17:56:34,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:56:34,244 INFO L276 IsEmpty]: Start isEmpty. Operand 2860 states and 3668 transitions. [2021-11-25 17:56:34,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-25 17:56:34,246 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:56:34,246 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:56:34,246 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-25 17:56:34,246 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 17:56:34,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:56:34,247 INFO L85 PathProgramCache]: Analyzing trace with hash -1344491359, now seen corresponding path program 1 times [2021-11-25 17:56:34,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:56:34,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859198036] [2021-11-25 17:56:34,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:56:34,247 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:56:34,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:56:34,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:56:34,774 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:56:34,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859198036] [2021-11-25 17:56:34,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859198036] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:56:34,774 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:56:34,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-11-25 17:56:34,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156108691] [2021-11-25 17:56:34,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:56:34,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-25 17:56:34,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:56:34,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-25 17:56:34,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-11-25 17:56:34,776 INFO L87 Difference]: Start difference. First operand 2860 states and 3668 transitions. Second operand has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:56:37,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:56:37,795 INFO L93 Difference]: Finished difference Result 4531 states and 5793 transitions. [2021-11-25 17:56:37,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-25 17:56:37,795 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-25 17:56:37,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:56:37,800 INFO L225 Difference]: With dead ends: 4531 [2021-11-25 17:56:37,800 INFO L226 Difference]: Without dead ends: 4527 [2021-11-25 17:56:37,801 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=212, Invalid=1048, Unknown=0, NotChecked=0, Total=1260 [2021-11-25 17:56:37,802 INFO L933 BasicCegarLoop]: 437 mSDtfsCounter, 2501 mSDsluCounter, 4381 mSDsCounter, 0 mSdLazyCounter, 2292 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2501 SdHoareTripleChecker+Valid, 4792 SdHoareTripleChecker+Invalid, 2385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 2292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-25 17:56:37,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2501 Valid, 4792 Invalid, 2385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 2292 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-25 17:56:37,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4527 states. [2021-11-25 17:56:38,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4527 to 2860. [2021-11-25 17:56:38,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2860 states, 2856 states have (on average 1.2839635854341738) internal successors, (3667), 2859 states have internal predecessors, (3667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:56:38,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2860 states to 2860 states and 3667 transitions. [2021-11-25 17:56:38,288 INFO L78 Accepts]: Start accepts. Automaton has 2860 states and 3667 transitions. Word has length 57 [2021-11-25 17:56:38,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:56:38,288 INFO L470 AbstractCegarLoop]: Abstraction has 2860 states and 3667 transitions. [2021-11-25 17:56:38,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:56:38,289 INFO L276 IsEmpty]: Start isEmpty. Operand 2860 states and 3667 transitions. [2021-11-25 17:56:38,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-25 17:56:38,293 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:56:38,294 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:56:38,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-25 17:56:38,295 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 17:56:38,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:56:38,296 INFO L85 PathProgramCache]: Analyzing trace with hash 972832554, now seen corresponding path program 1 times [2021-11-25 17:56:38,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:56:38,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930967096] [2021-11-25 17:56:38,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:56:38,298 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:56:38,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:56:38,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:56:38,637 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:56:38,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930967096] [2021-11-25 17:56:38,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930967096] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:56:38,637 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:56:38,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-25 17:56:38,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280420316] [2021-11-25 17:56:38,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:56:38,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-25 17:56:38,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:56:38,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-25 17:56:38,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-25 17:56:38,639 INFO L87 Difference]: Start difference. First operand 2860 states and 3667 transitions. Second operand has 10 states, 10 states have (on average 5.7) internal successors, (57), 9 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:56:40,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:56:40,234 INFO L93 Difference]: Finished difference Result 4771 states and 6145 transitions. [2021-11-25 17:56:40,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-25 17:56:40,235 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.7) internal successors, (57), 9 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-25 17:56:40,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:56:40,240 INFO L225 Difference]: With dead ends: 4771 [2021-11-25 17:56:40,240 INFO L226 Difference]: Without dead ends: 4235 [2021-11-25 17:56:40,241 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=108, Invalid=234, Unknown=0, NotChecked=0, Total=342 [2021-11-25 17:56:40,242 INFO L933 BasicCegarLoop]: 507 mSDtfsCounter, 1907 mSDsluCounter, 1170 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1907 SdHoareTripleChecker+Valid, 1660 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 17:56:40,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1907 Valid, 1660 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 17:56:40,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4235 states. [2021-11-25 17:56:40,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4235 to 2802. [2021-11-25 17:56:40,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2802 states, 2799 states have (on average 1.284387281171847) internal successors, (3595), 2801 states have internal predecessors, (3595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:56:40,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2802 states to 2802 states and 3595 transitions. [2021-11-25 17:56:40,727 INFO L78 Accepts]: Start accepts. Automaton has 2802 states and 3595 transitions. Word has length 57 [2021-11-25 17:56:40,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:56:40,727 INFO L470 AbstractCegarLoop]: Abstraction has 2802 states and 3595 transitions. [2021-11-25 17:56:40,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.7) internal successors, (57), 9 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:56:40,728 INFO L276 IsEmpty]: Start isEmpty. Operand 2802 states and 3595 transitions. [2021-11-25 17:56:40,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-25 17:56:40,731 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:56:40,731 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:56:40,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-25 17:56:40,731 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 17:56:40,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:56:40,732 INFO L85 PathProgramCache]: Analyzing trace with hash -45383322, now seen corresponding path program 1 times [2021-11-25 17:56:40,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:56:40,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625280282] [2021-11-25 17:56:40,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:56:40,733 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:56:40,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:56:40,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:56:40,767 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:56:40,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625280282] [2021-11-25 17:56:40,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625280282] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:56:40,768 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:56:40,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 17:56:40,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75523476] [2021-11-25 17:56:40,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:56:40,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 17:56:40,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:56:40,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 17:56:40,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 17:56:40,770 INFO L87 Difference]: Start difference. First operand 2802 states and 3595 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:56:41,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:56:41,370 INFO L93 Difference]: Finished difference Result 4722 states and 6068 transitions. [2021-11-25 17:56:41,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 17:56:41,370 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-25 17:56:41,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:56:41,374 INFO L225 Difference]: With dead ends: 4722 [2021-11-25 17:56:41,374 INFO L226 Difference]: Without dead ends: 3249 [2021-11-25 17:56:41,376 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 17:56:41,377 INFO L933 BasicCegarLoop]: 255 mSDtfsCounter, 221 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 17:56:41,378 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 351 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 17:56:41,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3249 states. [2021-11-25 17:56:41,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3249 to 2645. [2021-11-25 17:56:41,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2645 states, 2643 states have (on average 1.2830117290957246) internal successors, (3391), 2644 states have internal predecessors, (3391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:56:41,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2645 states to 2645 states and 3391 transitions. [2021-11-25 17:56:41,807 INFO L78 Accepts]: Start accepts. Automaton has 2645 states and 3391 transitions. Word has length 57 [2021-11-25 17:56:41,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:56:41,807 INFO L470 AbstractCegarLoop]: Abstraction has 2645 states and 3391 transitions. [2021-11-25 17:56:41,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:56:41,808 INFO L276 IsEmpty]: Start isEmpty. Operand 2645 states and 3391 transitions. [2021-11-25 17:56:41,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-25 17:56:41,810 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:56:41,811 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:56:41,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-25 17:56:41,811 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 17:56:41,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:56:41,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1565233070, now seen corresponding path program 1 times [2021-11-25 17:56:41,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:56:41,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159700023] [2021-11-25 17:56:41,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:56:41,812 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:56:41,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:56:42,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:56:42,301 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:56:42,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159700023] [2021-11-25 17:56:42,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159700023] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:56:42,301 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:56:42,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-11-25 17:56:42,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411939605] [2021-11-25 17:56:42,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:56:42,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-25 17:56:42,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:56:42,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-25 17:56:42,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-11-25 17:56:42,304 INFO L87 Difference]: Start difference. First operand 2645 states and 3391 transitions. Second operand has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:56:44,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:56:44,746 INFO L93 Difference]: Finished difference Result 4678 states and 6006 transitions. [2021-11-25 17:56:44,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-25 17:56:44,747 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-25 17:56:44,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:56:44,751 INFO L225 Difference]: With dead ends: 4678 [2021-11-25 17:56:44,751 INFO L226 Difference]: Without dead ends: 4540 [2021-11-25 17:56:44,752 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=191, Invalid=739, Unknown=0, NotChecked=0, Total=930 [2021-11-25 17:56:44,753 INFO L933 BasicCegarLoop]: 474 mSDtfsCounter, 1753 mSDsluCounter, 3359 mSDsCounter, 0 mSdLazyCounter, 1360 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1753 SdHoareTripleChecker+Valid, 3809 SdHoareTripleChecker+Invalid, 1418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-25 17:56:44,753 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1753 Valid, 3809 Invalid, 1418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1360 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-25 17:56:44,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4540 states. [2021-11-25 17:56:45,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4540 to 2631. [2021-11-25 17:56:45,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2631 states, 2630 states have (on average 1.2828897338403042) internal successors, (3374), 2630 states have internal predecessors, (3374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:56:45,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2631 states to 2631 states and 3374 transitions. [2021-11-25 17:56:45,179 INFO L78 Accepts]: Start accepts. Automaton has 2631 states and 3374 transitions. Word has length 58 [2021-11-25 17:56:45,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:56:45,179 INFO L470 AbstractCegarLoop]: Abstraction has 2631 states and 3374 transitions. [2021-11-25 17:56:45,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:56:45,179 INFO L276 IsEmpty]: Start isEmpty. Operand 2631 states and 3374 transitions. [2021-11-25 17:56:45,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-25 17:56:45,182 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:56:45,182 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:56:45,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-25 17:56:45,183 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 17:56:45,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:56:45,183 INFO L85 PathProgramCache]: Analyzing trace with hash -837352641, now seen corresponding path program 1 times [2021-11-25 17:56:45,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:56:45,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371034945] [2021-11-25 17:56:45,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:56:45,184 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:56:45,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:56:45,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:56:45,260 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:56:45,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371034945] [2021-11-25 17:56:45,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371034945] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:56:45,260 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:56:45,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 17:56:45,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853375663] [2021-11-25 17:56:45,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:56:45,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 17:56:45,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:56:45,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 17:56:45,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-25 17:56:45,262 INFO L87 Difference]: Start difference. First operand 2631 states and 3374 transitions. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:56:45,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:56:45,799 INFO L93 Difference]: Finished difference Result 2637 states and 3377 transitions. [2021-11-25 17:56:45,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 17:56:45,800 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-25 17:56:45,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:56:45,802 INFO L225 Difference]: With dead ends: 2637 [2021-11-25 17:56:45,802 INFO L226 Difference]: Without dead ends: 2278 [2021-11-25 17:56:45,803 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-25 17:56:45,804 INFO L933 BasicCegarLoop]: 364 mSDtfsCounter, 535 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 535 SdHoareTripleChecker+Valid, 687 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 17:56:45,804 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [535 Valid, 687 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 17:56:45,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2278 states. [2021-11-25 17:56:46,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2278 to 2274. [2021-11-25 17:56:46,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2274 states, 2273 states have (on average 1.2811262648482182) internal successors, (2912), 2273 states have internal predecessors, (2912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:56:46,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2274 states to 2274 states and 2912 transitions. [2021-11-25 17:56:46,251 INFO L78 Accepts]: Start accepts. Automaton has 2274 states and 2912 transitions. Word has length 59 [2021-11-25 17:56:46,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:56:46,251 INFO L470 AbstractCegarLoop]: Abstraction has 2274 states and 2912 transitions. [2021-11-25 17:56:46,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:56:46,251 INFO L276 IsEmpty]: Start isEmpty. Operand 2274 states and 2912 transitions. [2021-11-25 17:56:46,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-25 17:56:46,254 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:56:46,254 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:56:46,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-25 17:56:46,254 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 17:56:46,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:56:46,255 INFO L85 PathProgramCache]: Analyzing trace with hash -2061249799, now seen corresponding path program 1 times [2021-11-25 17:56:46,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:56:46,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541163136] [2021-11-25 17:56:46,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:56:46,255 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:56:46,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:56:46,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:56:46,300 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:56:46,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541163136] [2021-11-25 17:56:46,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541163136] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:56:46,300 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:56:46,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 17:56:46,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978971242] [2021-11-25 17:56:46,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:56:46,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 17:56:46,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:56:46,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 17:56:46,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 17:56:46,302 INFO L87 Difference]: Start difference. First operand 2274 states and 2912 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:56:46,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:56:46,877 INFO L93 Difference]: Finished difference Result 4196 states and 5472 transitions. [2021-11-25 17:56:46,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 17:56:46,878 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-25 17:56:46,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:56:46,881 INFO L225 Difference]: With dead ends: 4196 [2021-11-25 17:56:46,881 INFO L226 Difference]: Without dead ends: 3084 [2021-11-25 17:56:46,883 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 17:56:46,884 INFO L933 BasicCegarLoop]: 302 mSDtfsCounter, 113 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 475 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 17:56:46,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 475 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 17:56:46,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3084 states. [2021-11-25 17:56:47,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3084 to 2890. [2021-11-25 17:56:47,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2890 states, 2889 states have (on average 1.2748355832467981) internal successors, (3683), 2889 states have internal predecessors, (3683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:56:47,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2890 states to 2890 states and 3683 transitions. [2021-11-25 17:56:47,415 INFO L78 Accepts]: Start accepts. Automaton has 2890 states and 3683 transitions. Word has length 60 [2021-11-25 17:56:47,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:56:47,416 INFO L470 AbstractCegarLoop]: Abstraction has 2890 states and 3683 transitions. [2021-11-25 17:56:47,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:56:47,416 INFO L276 IsEmpty]: Start isEmpty. Operand 2890 states and 3683 transitions. [2021-11-25 17:56:47,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-25 17:56:47,418 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:56:47,418 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:56:47,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-25 17:56:47,419 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 17:56:47,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:56:47,419 INFO L85 PathProgramCache]: Analyzing trace with hash -1793943078, now seen corresponding path program 1 times [2021-11-25 17:56:47,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:56:47,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766197610] [2021-11-25 17:56:47,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:56:47,420 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:56:47,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:56:47,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:56:47,467 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:56:47,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766197610] [2021-11-25 17:56:47,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766197610] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:56:47,468 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:56:47,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 17:56:47,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024602242] [2021-11-25 17:56:47,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:56:47,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 17:56:47,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:56:47,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 17:56:47,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 17:56:47,469 INFO L87 Difference]: Start difference. First operand 2890 states and 3683 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:56:48,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:56:48,270 INFO L93 Difference]: Finished difference Result 5708 states and 7416 transitions. [2021-11-25 17:56:48,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 17:56:48,270 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-11-25 17:56:48,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:56:48,274 INFO L225 Difference]: With dead ends: 5708 [2021-11-25 17:56:48,275 INFO L226 Difference]: Without dead ends: 4150 [2021-11-25 17:56:48,277 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 17:56:48,278 INFO L933 BasicCegarLoop]: 286 mSDtfsCounter, 101 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 17:56:48,278 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 463 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 17:56:48,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4150 states. [2021-11-25 17:56:49,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4150 to 3740. [2021-11-25 17:56:49,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3740 states, 3739 states have (on average 1.270393153249532) internal successors, (4750), 3739 states have internal predecessors, (4750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:56:49,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3740 states to 3740 states and 4750 transitions. [2021-11-25 17:56:49,023 INFO L78 Accepts]: Start accepts. Automaton has 3740 states and 4750 transitions. Word has length 63 [2021-11-25 17:56:49,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:56:49,024 INFO L470 AbstractCegarLoop]: Abstraction has 3740 states and 4750 transitions. [2021-11-25 17:56:49,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:56:49,024 INFO L276 IsEmpty]: Start isEmpty. Operand 3740 states and 4750 transitions. [2021-11-25 17:56:49,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-25 17:56:49,026 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:56:49,027 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:56:49,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-25 17:56:49,027 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 17:56:49,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:56:49,028 INFO L85 PathProgramCache]: Analyzing trace with hash -1784118065, now seen corresponding path program 1 times [2021-11-25 17:56:49,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:56:49,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757417255] [2021-11-25 17:56:49,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:56:49,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:56:49,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:56:49,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:56:49,074 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:56:49,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757417255] [2021-11-25 17:56:49,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757417255] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:56:49,075 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:56:49,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 17:56:49,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492470373] [2021-11-25 17:56:49,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:56:49,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 17:56:49,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:56:49,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 17:56:49,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 17:56:49,077 INFO L87 Difference]: Start difference. First operand 3740 states and 4750 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:56:50,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:56:50,224 INFO L93 Difference]: Finished difference Result 7688 states and 9930 transitions. [2021-11-25 17:56:50,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 17:56:50,224 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-25 17:56:50,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:56:50,229 INFO L225 Difference]: With dead ends: 7688 [2021-11-25 17:56:50,229 INFO L226 Difference]: Without dead ends: 5580 [2021-11-25 17:56:50,234 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 17:56:50,235 INFO L933 BasicCegarLoop]: 268 mSDtfsCounter, 79 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 17:56:50,236 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 453 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 17:56:50,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5580 states. [2021-11-25 17:56:51,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5580 to 5058. [2021-11-25 17:56:51,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5058 states, 5057 states have (on average 1.2649792367016017) internal successors, (6397), 5057 states have internal predecessors, (6397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:56:51,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5058 states to 5058 states and 6397 transitions. [2021-11-25 17:56:51,389 INFO L78 Accepts]: Start accepts. Automaton has 5058 states and 6397 transitions. Word has length 67 [2021-11-25 17:56:51,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:56:51,389 INFO L470 AbstractCegarLoop]: Abstraction has 5058 states and 6397 transitions. [2021-11-25 17:56:51,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:56:51,389 INFO L276 IsEmpty]: Start isEmpty. Operand 5058 states and 6397 transitions. [2021-11-25 17:56:51,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-25 17:56:51,391 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:56:51,391 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:56:51,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-25 17:56:51,392 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 17:56:51,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:56:51,392 INFO L85 PathProgramCache]: Analyzing trace with hash 646647996, now seen corresponding path program 1 times [2021-11-25 17:56:51,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:56:51,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968903581] [2021-11-25 17:56:51,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:56:51,393 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:56:51,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:56:51,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:56:51,504 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:56:51,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968903581] [2021-11-25 17:56:51,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968903581] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:56:51,505 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:56:51,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-25 17:56:51,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843109573] [2021-11-25 17:56:51,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:56:51,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-25 17:56:51,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:56:51,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-25 17:56:51,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-11-25 17:56:51,507 INFO L87 Difference]: Start difference. First operand 5058 states and 6397 transitions. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:56:54,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:56:54,038 INFO L93 Difference]: Finished difference Result 10498 states and 13372 transitions. [2021-11-25 17:56:54,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-25 17:56:54,038 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-25 17:56:54,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:56:54,049 INFO L225 Difference]: With dead ends: 10498 [2021-11-25 17:56:54,049 INFO L226 Difference]: Without dead ends: 10496 [2021-11-25 17:56:54,052 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=123, Invalid=339, Unknown=0, NotChecked=0, Total=462 [2021-11-25 17:56:54,052 INFO L933 BasicCegarLoop]: 325 mSDtfsCounter, 1221 mSDsluCounter, 1459 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1221 SdHoareTripleChecker+Valid, 1772 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 17:56:54,053 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1221 Valid, 1772 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 17:56:54,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10496 states. [2021-11-25 17:56:55,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10496 to 6195. [2021-11-25 17:56:55,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6195 states, 6194 states have (on average 1.2612205360025832) internal successors, (7812), 6194 states have internal predecessors, (7812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:56:55,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6195 states to 6195 states and 7812 transitions. [2021-11-25 17:56:55,405 INFO L78 Accepts]: Start accepts. Automaton has 6195 states and 7812 transitions. Word has length 71 [2021-11-25 17:56:55,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:56:55,406 INFO L470 AbstractCegarLoop]: Abstraction has 6195 states and 7812 transitions. [2021-11-25 17:56:55,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:56:55,406 INFO L276 IsEmpty]: Start isEmpty. Operand 6195 states and 7812 transitions. [2021-11-25 17:56:55,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-25 17:56:55,409 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:56:55,410 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:56:55,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-25 17:56:55,410 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 17:56:55,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:56:55,411 INFO L85 PathProgramCache]: Analyzing trace with hash 33226800, now seen corresponding path program 1 times [2021-11-25 17:56:55,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:56:55,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37345425] [2021-11-25 17:56:55,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:56:55,411 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:56:55,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:56:55,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:56:55,479 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:56:55,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37345425] [2021-11-25 17:56:55,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37345425] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:56:55,479 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:56:55,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 17:56:55,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437749064] [2021-11-25 17:56:55,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:56:55,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 17:56:55,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:56:55,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 17:56:55,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-25 17:56:55,481 INFO L87 Difference]: Start difference. First operand 6195 states and 7812 transitions. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 6 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:56:59,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:56:59,648 INFO L93 Difference]: Finished difference Result 18374 states and 23353 transitions. [2021-11-25 17:56:59,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-25 17:56:59,649 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 6 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-25 17:56:59,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:56:59,666 INFO L225 Difference]: With dead ends: 18374 [2021-11-25 17:56:59,666 INFO L226 Difference]: Without dead ends: 16582 [2021-11-25 17:56:59,670 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-11-25 17:56:59,671 INFO L933 BasicCegarLoop]: 149 mSDtfsCounter, 1803 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1803 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 17:56:59,671 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1803 Valid, 439 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 17:56:59,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16582 states. [2021-11-25 17:57:01,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16582 to 6257. [2021-11-25 17:57:01,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6257 states, 6256 states have (on average 1.260230179028133) internal successors, (7884), 6256 states have internal predecessors, (7884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:57:01,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6257 states to 6257 states and 7884 transitions. [2021-11-25 17:57:01,080 INFO L78 Accepts]: Start accepts. Automaton has 6257 states and 7884 transitions. Word has length 74 [2021-11-25 17:57:01,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:57:01,080 INFO L470 AbstractCegarLoop]: Abstraction has 6257 states and 7884 transitions. [2021-11-25 17:57:01,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 6 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:57:01,080 INFO L276 IsEmpty]: Start isEmpty. Operand 6257 states and 7884 transitions. [2021-11-25 17:57:01,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-25 17:57:01,084 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:57:01,084 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:57:01,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-25 17:57:01,085 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 17:57:01,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:57:01,085 INFO L85 PathProgramCache]: Analyzing trace with hash 129485338, now seen corresponding path program 1 times [2021-11-25 17:57:01,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:57:01,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633763292] [2021-11-25 17:57:01,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:57:01,086 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:57:01,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:57:01,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:57:01,223 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:57:01,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633763292] [2021-11-25 17:57:01,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633763292] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:57:01,224 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:57:01,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-25 17:57:01,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571203924] [2021-11-25 17:57:01,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:57:01,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-25 17:57:01,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:57:01,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-25 17:57:01,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-25 17:57:01,226 INFO L87 Difference]: Start difference. First operand 6257 states and 7884 transitions. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:57:03,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:57:03,899 INFO L93 Difference]: Finished difference Result 10454 states and 13312 transitions. [2021-11-25 17:57:03,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-25 17:57:03,899 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-11-25 17:57:03,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:57:03,910 INFO L225 Difference]: With dead ends: 10454 [2021-11-25 17:57:03,910 INFO L226 Difference]: Without dead ends: 10452 [2021-11-25 17:57:03,912 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-11-25 17:57:03,912 INFO L933 BasicCegarLoop]: 346 mSDtfsCounter, 960 mSDsluCounter, 1243 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 960 SdHoareTripleChecker+Valid, 1573 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 17:57:03,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [960 Valid, 1573 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 17:57:03,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10452 states. [2021-11-25 17:57:05,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10452 to 6671. [2021-11-25 17:57:05,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6671 states, 6670 states have (on average 1.2592203898050975) internal successors, (8399), 6670 states have internal predecessors, (8399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:57:05,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6671 states to 6671 states and 8399 transitions. [2021-11-25 17:57:05,603 INFO L78 Accepts]: Start accepts. Automaton has 6671 states and 8399 transitions. Word has length 76 [2021-11-25 17:57:05,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:57:05,603 INFO L470 AbstractCegarLoop]: Abstraction has 6671 states and 8399 transitions. [2021-11-25 17:57:05,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:57:05,604 INFO L276 IsEmpty]: Start isEmpty. Operand 6671 states and 8399 transitions. [2021-11-25 17:57:05,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-25 17:57:05,607 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:57:05,607 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:57:05,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-11-25 17:57:05,607 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 17:57:05,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:57:05,607 INFO L85 PathProgramCache]: Analyzing trace with hash 959613867, now seen corresponding path program 1 times [2021-11-25 17:57:05,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:57:05,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023730425] [2021-11-25 17:57:05,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:57:05,608 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:57:05,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:57:05,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:57:05,663 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:57:05,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023730425] [2021-11-25 17:57:05,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023730425] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:57:05,663 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:57:05,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 17:57:05,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141382688] [2021-11-25 17:57:05,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:57:05,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 17:57:05,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:57:05,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 17:57:05,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 17:57:05,665 INFO L87 Difference]: Start difference. First operand 6671 states and 8399 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:57:07,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:57:07,651 INFO L93 Difference]: Finished difference Result 9977 states and 12586 transitions. [2021-11-25 17:57:07,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 17:57:07,651 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-25 17:57:07,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:57:07,658 INFO L225 Difference]: With dead ends: 9977 [2021-11-25 17:57:07,658 INFO L226 Difference]: Without dead ends: 7049 [2021-11-25 17:57:07,661 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 17:57:07,662 INFO L933 BasicCegarLoop]: 204 mSDtfsCounter, 186 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 17:57:07,662 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 305 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 17:57:07,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7049 states. [2021-11-25 17:57:09,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7049 to 6241. [2021-11-25 17:57:09,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6241 states, 6240 states have (on average 1.2541666666666667) internal successors, (7826), 6240 states have internal predecessors, (7826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:57:09,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6241 states to 6241 states and 7826 transitions. [2021-11-25 17:57:09,060 INFO L78 Accepts]: Start accepts. Automaton has 6241 states and 7826 transitions. Word has length 77 [2021-11-25 17:57:09,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:57:09,060 INFO L470 AbstractCegarLoop]: Abstraction has 6241 states and 7826 transitions. [2021-11-25 17:57:09,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:57:09,061 INFO L276 IsEmpty]: Start isEmpty. Operand 6241 states and 7826 transitions. [2021-11-25 17:57:09,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-25 17:57:09,063 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:57:09,063 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:57:09,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-11-25 17:57:09,063 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 17:57:09,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:57:09,064 INFO L85 PathProgramCache]: Analyzing trace with hash 267495290, now seen corresponding path program 1 times [2021-11-25 17:57:09,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:57:09,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211385440] [2021-11-25 17:57:09,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:57:09,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:57:09,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:57:09,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:57:09,182 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:57:09,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211385440] [2021-11-25 17:57:09,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211385440] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:57:09,182 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:57:09,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-25 17:57:09,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009283347] [2021-11-25 17:57:09,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:57:09,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-25 17:57:09,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:57:09,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-25 17:57:09,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-25 17:57:09,184 INFO L87 Difference]: Start difference. First operand 6241 states and 7826 transitions. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:57:11,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:57:11,635 INFO L93 Difference]: Finished difference Result 9860 states and 12498 transitions. [2021-11-25 17:57:11,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-25 17:57:11,636 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-25 17:57:11,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:57:11,647 INFO L225 Difference]: With dead ends: 9860 [2021-11-25 17:57:11,647 INFO L226 Difference]: Without dead ends: 9858 [2021-11-25 17:57:11,650 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-11-25 17:57:11,651 INFO L933 BasicCegarLoop]: 325 mSDtfsCounter, 826 mSDsluCounter, 1338 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 826 SdHoareTripleChecker+Valid, 1646 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 17:57:11,651 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [826 Valid, 1646 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 17:57:11,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9858 states. [2021-11-25 17:57:13,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9858 to 6519. [2021-11-25 17:57:13,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6519 states, 6518 states have (on average 1.2536054004295796) internal successors, (8171), 6518 states have internal predecessors, (8171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:57:13,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6519 states to 6519 states and 8171 transitions. [2021-11-25 17:57:13,211 INFO L78 Accepts]: Start accepts. Automaton has 6519 states and 8171 transitions. Word has length 77 [2021-11-25 17:57:13,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:57:13,212 INFO L470 AbstractCegarLoop]: Abstraction has 6519 states and 8171 transitions. [2021-11-25 17:57:13,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:57:13,212 INFO L276 IsEmpty]: Start isEmpty. Operand 6519 states and 8171 transitions. [2021-11-25 17:57:13,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-25 17:57:13,214 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:57:13,214 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:57:13,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-11-25 17:57:13,215 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 17:57:13,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:57:13,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1335716670, now seen corresponding path program 1 times [2021-11-25 17:57:13,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:57:13,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313409584] [2021-11-25 17:57:13,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:57:13,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:57:13,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:57:13,319 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-25 17:57:13,320 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:57:13,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313409584] [2021-11-25 17:57:13,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313409584] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:57:13,320 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:57:13,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-25 17:57:13,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347975794] [2021-11-25 17:57:13,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:57:13,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 17:57:13,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:57:13,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 17:57:13,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-25 17:57:13,322 INFO L87 Difference]: Start difference. First operand 6519 states and 8171 transitions. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:57:16,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:57:16,188 INFO L93 Difference]: Finished difference Result 12593 states and 15745 transitions. [2021-11-25 17:57:16,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-25 17:57:16,188 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-11-25 17:57:16,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:57:16,198 INFO L225 Difference]: With dead ends: 12593 [2021-11-25 17:57:16,198 INFO L226 Difference]: Without dead ends: 9489 [2021-11-25 17:57:16,203 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-11-25 17:57:16,204 INFO L933 BasicCegarLoop]: 217 mSDtfsCounter, 589 mSDsluCounter, 698 mSDsCounter, 0 mSdLazyCounter, 734 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 589 SdHoareTripleChecker+Valid, 915 SdHoareTripleChecker+Invalid, 761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 734 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 17:57:16,204 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [589 Valid, 915 Invalid, 761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 734 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 17:57:16,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9489 states. [2021-11-25 17:57:17,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9489 to 6389. [2021-11-25 17:57:17,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6389 states, 6388 states have (on average 1.2554790231684407) internal successors, (8020), 6388 states have internal predecessors, (8020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:57:17,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6389 states to 6389 states and 8020 transitions. [2021-11-25 17:57:17,796 INFO L78 Accepts]: Start accepts. Automaton has 6389 states and 8020 transitions. Word has length 81 [2021-11-25 17:57:17,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:57:17,797 INFO L470 AbstractCegarLoop]: Abstraction has 6389 states and 8020 transitions. [2021-11-25 17:57:17,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:57:17,797 INFO L276 IsEmpty]: Start isEmpty. Operand 6389 states and 8020 transitions. [2021-11-25 17:57:17,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-25 17:57:17,799 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:57:17,799 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:57:17,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-11-25 17:57:17,800 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 17:57:17,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:57:17,800 INFO L85 PathProgramCache]: Analyzing trace with hash -944547346, now seen corresponding path program 1 times [2021-11-25 17:57:17,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:57:17,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602339810] [2021-11-25 17:57:17,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:57:17,801 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:57:17,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:57:18,147 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:57:18,147 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:57:18,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602339810] [2021-11-25 17:57:18,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602339810] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 17:57:18,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006502296] [2021-11-25 17:57:18,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:57:18,148 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:57:18,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35cb1c11-643e-46da-8804-892c7204f1be/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:57:18,149 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35cb1c11-643e-46da-8804-892c7204f1be/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:57:18,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35cb1c11-643e-46da-8804-892c7204f1be/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 17:57:18,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:57:18,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-25 17:57:18,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:57:18,960 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-25 17:57:18,960 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 17:57:18,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006502296] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:57:18,961 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 17:57:18,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [16] total 22 [2021-11-25 17:57:18,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523374987] [2021-11-25 17:57:18,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:57:18,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 17:57:18,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:57:18,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 17:57:18,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-11-25 17:57:18,963 INFO L87 Difference]: Start difference. First operand 6389 states and 8020 transitions. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:57:21,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:57:21,981 INFO L93 Difference]: Finished difference Result 10533 states and 13239 transitions. [2021-11-25 17:57:21,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 17:57:21,981 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-11-25 17:57:21,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:57:21,990 INFO L225 Difference]: With dead ends: 10533 [2021-11-25 17:57:21,990 INFO L226 Difference]: Without dead ends: 7868 [2021-11-25 17:57:21,994 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2021-11-25 17:57:21,995 INFO L933 BasicCegarLoop]: 216 mSDtfsCounter, 553 mSDsluCounter, 552 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 553 SdHoareTripleChecker+Valid, 768 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 17:57:21,995 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [553 Valid, 768 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 17:57:22,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7868 states. [2021-11-25 17:57:23,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7868 to 6359. [2021-11-25 17:57:23,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6359 states, 6358 states have (on average 1.255426234664989) internal successors, (7982), 6358 states have internal predecessors, (7982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:57:23,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6359 states to 6359 states and 7982 transitions. [2021-11-25 17:57:23,598 INFO L78 Accepts]: Start accepts. Automaton has 6359 states and 7982 transitions. Word has length 81 [2021-11-25 17:57:23,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:57:23,598 INFO L470 AbstractCegarLoop]: Abstraction has 6359 states and 7982 transitions. [2021-11-25 17:57:23,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:57:23,598 INFO L276 IsEmpty]: Start isEmpty. Operand 6359 states and 7982 transitions. [2021-11-25 17:57:23,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-25 17:57:23,600 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:57:23,601 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:57:23,638 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35cb1c11-643e-46da-8804-892c7204f1be/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-25 17:57:23,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35cb1c11-643e-46da-8804-892c7204f1be/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:57:23,815 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 17:57:23,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:57:23,815 INFO L85 PathProgramCache]: Analyzing trace with hash 1174119775, now seen corresponding path program 1 times [2021-11-25 17:57:23,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:57:23,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244461916] [2021-11-25 17:57:23,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:57:23,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:57:23,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:57:24,174 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:57:24,174 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:57:24,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244461916] [2021-11-25 17:57:24,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244461916] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 17:57:24,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944186656] [2021-11-25 17:57:24,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:57:24,175 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:57:24,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35cb1c11-643e-46da-8804-892c7204f1be/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:57:24,176 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35cb1c11-643e-46da-8804-892c7204f1be/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:57:24,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35cb1c11-643e-46da-8804-892c7204f1be/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 17:57:24,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:57:24,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-25 17:57:24,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:57:25,863 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-25 17:57:25,864 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 17:57:25,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944186656] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:57:25,864 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 17:57:25,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [16] total 28 [2021-11-25 17:57:25,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844890380] [2021-11-25 17:57:25,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:57:25,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-25 17:57:25,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:57:25,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-25 17:57:25,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2021-11-25 17:57:25,867 INFO L87 Difference]: Start difference. First operand 6359 states and 7982 transitions. Second operand has 14 states, 14 states have (on average 5.642857142857143) internal successors, (79), 13 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:57:28,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:57:28,944 INFO L93 Difference]: Finished difference Result 9055 states and 11415 transitions. [2021-11-25 17:57:28,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-25 17:57:28,944 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.642857142857143) internal successors, (79), 13 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-11-25 17:57:28,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:57:28,953 INFO L225 Difference]: With dead ends: 9055 [2021-11-25 17:57:28,953 INFO L226 Difference]: Without dead ends: 7664 [2021-11-25 17:57:28,957 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=217, Invalid=1265, Unknown=0, NotChecked=0, Total=1482 [2021-11-25 17:57:28,958 INFO L933 BasicCegarLoop]: 266 mSDtfsCounter, 1350 mSDsluCounter, 1819 mSDsCounter, 0 mSdLazyCounter, 691 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1350 SdHoareTripleChecker+Valid, 2038 SdHoareTripleChecker+Invalid, 741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-25 17:57:28,958 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1350 Valid, 2038 Invalid, 741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 691 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-25 17:57:28,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7664 states. [2021-11-25 17:57:30,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7664 to 6589. [2021-11-25 17:57:30,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6589 states, 6588 states have (on average 1.2575895567698847) internal successors, (8285), 6588 states have internal predecessors, (8285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:57:30,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6589 states to 6589 states and 8285 transitions. [2021-11-25 17:57:30,651 INFO L78 Accepts]: Start accepts. Automaton has 6589 states and 8285 transitions. Word has length 82 [2021-11-25 17:57:30,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:57:30,651 INFO L470 AbstractCegarLoop]: Abstraction has 6589 states and 8285 transitions. [2021-11-25 17:57:30,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.642857142857143) internal successors, (79), 13 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:57:30,651 INFO L276 IsEmpty]: Start isEmpty. Operand 6589 states and 8285 transitions. [2021-11-25 17:57:30,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-25 17:57:30,653 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:57:30,654 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:57:30,677 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35cb1c11-643e-46da-8804-892c7204f1be/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 17:57:30,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35cb1c11-643e-46da-8804-892c7204f1be/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-11-25 17:57:30,854 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 17:57:30,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:57:30,855 INFO L85 PathProgramCache]: Analyzing trace with hash -1456598149, now seen corresponding path program 1 times [2021-11-25 17:57:30,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:57:30,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276970582] [2021-11-25 17:57:30,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:57:30,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:57:30,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:57:31,239 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:57:31,240 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:57:31,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276970582] [2021-11-25 17:57:31,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276970582] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 17:57:31,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268279041] [2021-11-25 17:57:31,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:57:31,240 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:57:31,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35cb1c11-643e-46da-8804-892c7204f1be/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:57:31,245 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35cb1c11-643e-46da-8804-892c7204f1be/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:57:31,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35cb1c11-643e-46da-8804-892c7204f1be/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 17:57:31,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:57:31,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-25 17:57:31,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:57:32,186 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-25 17:57:32,186 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 17:57:32,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268279041] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:57:32,186 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 17:57:32,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [16] total 24 [2021-11-25 17:57:32,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016681195] [2021-11-25 17:57:32,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:57:32,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-25 17:57:32,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:57:32,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-25 17:57:32,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-11-25 17:57:32,188 INFO L87 Difference]: Start difference. First operand 6589 states and 8285 transitions. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:57:34,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:57:34,752 INFO L93 Difference]: Finished difference Result 9406 states and 11844 transitions. [2021-11-25 17:57:34,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-25 17:57:34,752 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-11-25 17:57:34,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:57:34,761 INFO L225 Difference]: With dead ends: 9406 [2021-11-25 17:57:34,761 INFO L226 Difference]: Without dead ends: 8082 [2021-11-25 17:57:34,764 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2021-11-25 17:57:34,765 INFO L933 BasicCegarLoop]: 271 mSDtfsCounter, 663 mSDsluCounter, 893 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 663 SdHoareTripleChecker+Valid, 1145 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 17:57:34,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [663 Valid, 1145 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 17:57:34,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8082 states. [2021-11-25 17:57:36,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8082 to 6668. [2021-11-25 17:57:36,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6668 states, 6667 states have (on average 1.2578371081445927) internal successors, (8386), 6667 states have internal predecessors, (8386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:57:36,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6668 states to 6668 states and 8386 transitions. [2021-11-25 17:57:36,539 INFO L78 Accepts]: Start accepts. Automaton has 6668 states and 8386 transitions. Word has length 82 [2021-11-25 17:57:36,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:57:36,539 INFO L470 AbstractCegarLoop]: Abstraction has 6668 states and 8386 transitions. [2021-11-25 17:57:36,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:57:36,539 INFO L276 IsEmpty]: Start isEmpty. Operand 6668 states and 8386 transitions. [2021-11-25 17:57:36,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-25 17:57:36,541 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:57:36,542 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:57:36,562 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35cb1c11-643e-46da-8804-892c7204f1be/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 17:57:36,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35cb1c11-643e-46da-8804-892c7204f1be/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:57:36,747 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 17:57:36,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:57:36,747 INFO L85 PathProgramCache]: Analyzing trace with hash 1359859737, now seen corresponding path program 1 times [2021-11-25 17:57:36,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:57:36,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328594793] [2021-11-25 17:57:36,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:57:36,747 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:57:36,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:57:37,103 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-25 17:57:37,104 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:57:37,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328594793] [2021-11-25 17:57:37,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328594793] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:57:37,104 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:57:37,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-25 17:57:37,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182311525] [2021-11-25 17:57:37,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:57:37,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-25 17:57:37,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:57:37,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-25 17:57:37,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-11-25 17:57:37,106 INFO L87 Difference]: Start difference. First operand 6668 states and 8386 transitions. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 10 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:57:40,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:57:40,516 INFO L93 Difference]: Finished difference Result 14455 states and 18280 transitions. [2021-11-25 17:57:40,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-25 17:57:40,516 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 10 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-11-25 17:57:40,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:57:40,527 INFO L225 Difference]: With dead ends: 14455 [2021-11-25 17:57:40,527 INFO L226 Difference]: Without dead ends: 10683 [2021-11-25 17:57:40,532 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=374, Unknown=0, NotChecked=0, Total=506 [2021-11-25 17:57:40,533 INFO L933 BasicCegarLoop]: 349 mSDtfsCounter, 1632 mSDsluCounter, 1680 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1632 SdHoareTripleChecker+Valid, 1991 SdHoareTripleChecker+Invalid, 523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 17:57:40,533 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1632 Valid, 1991 Invalid, 523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 474 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 17:57:40,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10683 states. [2021-11-25 17:57:42,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10683 to 6339. [2021-11-25 17:57:42,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6339 states, 6338 states have (on average 1.2557589144840644) internal successors, (7959), 6338 states have internal predecessors, (7959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:57:42,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6339 states to 6339 states and 7959 transitions. [2021-11-25 17:57:42,272 INFO L78 Accepts]: Start accepts. Automaton has 6339 states and 7959 transitions. Word has length 82 [2021-11-25 17:57:42,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:57:42,273 INFO L470 AbstractCegarLoop]: Abstraction has 6339 states and 7959 transitions. [2021-11-25 17:57:42,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 10 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:57:42,273 INFO L276 IsEmpty]: Start isEmpty. Operand 6339 states and 7959 transitions. [2021-11-25 17:57:42,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-25 17:57:42,275 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:57:42,275 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:57:42,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-11-25 17:57:42,275 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 17:57:42,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:57:42,275 INFO L85 PathProgramCache]: Analyzing trace with hash -1331667672, now seen corresponding path program 1 times [2021-11-25 17:57:42,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:57:42,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161023501] [2021-11-25 17:57:42,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:57:42,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:57:42,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:57:42,321 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-25 17:57:42,321 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:57:42,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161023501] [2021-11-25 17:57:42,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161023501] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:57:42,322 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:57:42,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 17:57:42,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972384051] [2021-11-25 17:57:42,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:57:42,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 17:57:42,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:57:42,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 17:57:42,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 17:57:42,323 INFO L87 Difference]: Start difference. First operand 6339 states and 7959 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:57:44,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:57:44,981 INFO L93 Difference]: Finished difference Result 13418 states and 16984 transitions. [2021-11-25 17:57:44,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 17:57:44,981 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-11-25 17:57:44,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:57:44,990 INFO L225 Difference]: With dead ends: 13418 [2021-11-25 17:57:44,990 INFO L226 Difference]: Without dead ends: 9103 [2021-11-25 17:57:44,995 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 17:57:44,995 INFO L933 BasicCegarLoop]: 209 mSDtfsCounter, 295 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 17:57:44,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [295 Valid, 446 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 17:57:45,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9103 states. [2021-11-25 17:57:46,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9103 to 6089. [2021-11-25 17:57:46,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6089 states, 6088 states have (on average 1.2403088042049935) internal successors, (7551), 6088 states have internal predecessors, (7551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:57:46,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6089 states to 6089 states and 7551 transitions. [2021-11-25 17:57:46,732 INFO L78 Accepts]: Start accepts. Automaton has 6089 states and 7551 transitions. Word has length 85 [2021-11-25 17:57:46,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:57:46,732 INFO L470 AbstractCegarLoop]: Abstraction has 6089 states and 7551 transitions. [2021-11-25 17:57:46,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:57:46,732 INFO L276 IsEmpty]: Start isEmpty. Operand 6089 states and 7551 transitions. [2021-11-25 17:57:46,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-25 17:57:46,734 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:57:46,734 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:57:46,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-11-25 17:57:46,735 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 17:57:46,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:57:46,735 INFO L85 PathProgramCache]: Analyzing trace with hash 1499228067, now seen corresponding path program 1 times [2021-11-25 17:57:46,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:57:46,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864919692] [2021-11-25 17:57:46,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:57:46,735 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:57:46,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:57:47,502 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:57:47,502 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:57:47,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864919692] [2021-11-25 17:57:47,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864919692] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 17:57:47,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173153419] [2021-11-25 17:57:47,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:57:47,502 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:57:47,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35cb1c11-643e-46da-8804-892c7204f1be/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:57:47,503 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35cb1c11-643e-46da-8804-892c7204f1be/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:57:47,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35cb1c11-643e-46da-8804-892c7204f1be/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 17:57:47,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:57:47,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 76 conjunts are in the unsatisfiable core [2021-11-25 17:57:47,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:57:52,480 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:57:52,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:58:11,072 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:58:11,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173153419] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:58:11,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2139002703] [2021-11-25 17:58:11,104 INFO L159 IcfgInterpreter]: Started Sifa with 79 locations of interest [2021-11-25 17:58:11,105 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 17:58:11,110 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 17:58:11,115 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 17:58:11,115 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 17:58:11,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:58:11,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:58:11,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-25 17:58:11,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:58:11,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:58:11,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:58:11,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-25 17:58:43,785 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 17:59:54,933 WARN L227 SmtUtils]: Spent 5.09s on a formula simplification. DAG size of input: 443 DAG size of output: 312 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:00:01,709 WARN L227 SmtUtils]: Spent 5.03s on a formula simplification. DAG size of input: 444 DAG size of output: 313 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:00:42,905 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '609740#(and (= ~__return_7559~0 0) (<= |ULTIMATE.start_main_~node1____CPAchecker_TMP_0~2#1| 127) (<= 0 ~id3~0) (= ~__return_7335~0 0) (<= 0 (+ ~p3_new~0 1)) (= ~__return_7251~0 0) (<= 0 |ULTIMATE.start_main_~node1____CPAchecker_TMP_0~2#1|) (= ~__return_6919~0 0) (<= 1 ~__tmp_6512_0~0) (= ~__return_8412~0 0) (= ~__return_8804~0 0) (= ~__return_8621~0 0) (= ~__return_8133~0 0) (= ~__return_7366~0 0) (<= 0 (+ |ULTIMATE.start_main_~node3__m3~8#1| 1)) (<= 0 |ULTIMATE.start_main_~__tmp_3~0#1|) (<= |ULTIMATE.start_main_~__tmp_3~0#1| 1) (<= 0 ~id1~0) (= ~__return_6998~0 0) (= ~__return_7611~0 0) (= |ULTIMATE.start_main_~check__tmp~24#1| 1) (= |ULTIMATE.start_main_~check__tmp~1#1| 1) (= ~__return_6961~0 0) (<= 0 (+ |ULTIMATE.start_main_~node1__m1~2#1| 1)) (= ~p2~0 0) (<= (+ ~p1_new~0 1) 0) (<= |ULTIMATE.start_main_~main__c1~0#1| 1) (= ~__return_6869~0 0) (<= 1 ~__tmp_6555_0~0) (<= 1 ~__return_6484~0) (<= 1 ~__return_8015~0) (= ~__return_7186~0 0) (<= |ULTIMATE.start_main_~assert__arg~1#1| 1) (<= 0 (+ |ULTIMATE.start_main_~node3__m3~1#1| 1)) (<= ~send1~0 127) (<= ~st1~0 0) (= ~__return_7869~0 0) (= ~__return_7105~0 0) (<= 0 (+ ~p3_old~0 1)) (<= 0 |ULTIMATE.start_main_~__tmp_24~0#1|) (= ~__return_8362~0 0) (= (mod |ULTIMATE.start_main_~assert__arg~2#1| 256) 0) (= ~__return_6779~0 0) (<= ~mode2~0 1) (<= |ULTIMATE.start_main_~check__tmp~2#1| 1) (<= 0 ~st1~0) (= ~__return_8297~0 0) (<= 0 |ULTIMATE.start_main_~main____CPAchecker_TMP_0~20#1|) (= ~__return_6421~0 0) (= ~__return_8739~0 0) (<= 0 ~st2~0) (<= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~0#1| 0) (= ~__return_7842~0 0) (= ~__return_7154~0 0) (<= ~mode3~0 1) (<= 0 |ULTIMATE.start_main_~assert__arg~23#1|) (= ~__return_7303~0 0) (= ~__return_8509~0 0) (<= 0 (+ |ULTIMATE.start_main_~node1__m1~0#1| 1)) (<= ~__return_6484~0 1) (<= ~id1~0 127) (<= (+ ~p3_old~0 1) 0) (<= 0 |ULTIMATE.start_main_~main____CPAchecker_TMP_0~0#1|) (= ~__return_7678~0 0) (= ~__return_7952~0 0) (= ~__return_6712~0 0) (= ~__return_8770~0 0) (<= ~__tmp_6431_0~0 0) (<= 0 ~__tmp_6431_0~0) (= |ULTIMATE.start_main_~init__tmp~0#1| 1) (<= 0 (+ ~p2_new~0 1)) (<= (+ |ULTIMATE.start_main_~node1__m1~0#1| 1) 0) (<= 2 |ULTIMATE.start_main_~main__i2~0#1|) (= ~__return_6568~0 0) (<= (+ ~nomsg~0 1) 0) (<= ~mode1~0 1) (= ~__return_8164~0 0) (<= (+ ~p2_new~0 1) 0) (<= ~__tmp_6494_0~0 1) (<= ~__return_6343~0 1) (<= (+ |ULTIMATE.start_main_~node1__m1~2#1| 1) 0) (= ~__return_8328~0 0) (= ~__return_8049~0 0) (<= 1 |ULTIMATE.start_main_~main____CPAchecker_TMP_0~1#1|) (<= (+ |ULTIMATE.start_main_~node3__m3~8#1| 1) 0) (<= 0 |ULTIMATE.start_main_~assert__arg~1#1|) (= ~__return_7071~0 0) (<= ~id3~0 127) (<= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~20#1| 0) (= ~__return_8590~0 0) (= ~__return_7522~0 0) (= ~__return_7644~0 0) (<= |ULTIMATE.start_main_~assert__arg~23#1| 1) (<= 0 ~id2~0) (= |#NULL.offset| 0) (<= 0 (+ ~nomsg~0 1)) (= ~__return_7468~0 0) (<= 1 ~__return_6343~0) (= ~__return_8707~0 0) (<= (+ |ULTIMATE.start_main_~node3__m3~1#1| 1) 0) (<= |ULTIMATE.start_main_~node1____CPAchecker_TMP_0~0#1| 127) (= ~__return_7768~0 0) (<= 0 |ULTIMATE.start_main_~assert__arg~2#1|) (= ~__return_7728~0 0) (<= |ULTIMATE.start_main_~__tmp_24~0#1| 1) (= ~__return_7400~0 0) (<= (+ |ULTIMATE.start_main_~node1__m1~1#1| 1) 0) (= ~__return_7802~0 0) (<= |ULTIMATE.start_main_~__tmp_2~0#1| 1) (<= ~id2~0 127) (= ~__return_8444~0 0) (<= 0 ~st3~0) (= ~__return_7038~0 0) (<= (+ ~p3_new~0 1) 0) (= ~__return_8558~0 0) (<= 0 (+ |ULTIMATE.start_main_~node2__m2~0#1| 1)) (= ~p3~0 0) (= ~__return_8198~0 0) (<= 0 ~__return_7903~0) (<= 0 (+ ~p1_new~0 1)) (<= ~__return_8265~0 0) (<= ~__return_6554~0 1) (= ~__return_6835~0 0) (<= 0 |ULTIMATE.start_main_~node1____CPAchecker_TMP_0~0#1|) (= ~p1~0 0) (= ~__return_8655~0 0) (<= 1 ~__tmp_6494_0~0) (<= 0 |#StackHeapBarrier|) (<= 0 ~send1~0) (= ~__return_8475~0 0) (<= (+ |ULTIMATE.start_main_~node2__m2~0#1| 1) 0) (= ~__return_8101~0 0) (= ~__return_main~0 0) (<= 0 (+ |ULTIMATE.start_main_~node1__m1~1#1| 1)) (<= ~__return_8015~0 1) (<= |ULTIMATE.start_main_~assert__arg~2#1| 1) (= ~__return_7984~0 0) (<= ~__return_7903~0 0) (= ~__return_7217~0 0) (= |#NULL.base| 0) (<= 0 ~__return_8265~0) (<= 0 |ULTIMATE.start_main_~__tmp_2~0#1|))' at error location [2021-11-25 18:00:42,905 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:00:42,905 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:00:42,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 28, 26] total 72 [2021-11-25 18:00:42,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432665785] [2021-11-25 18:00:42,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:00:42,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2021-11-25 18:00:42,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:00:42,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-11-25 18:00:42,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2482, Invalid=15878, Unknown=0, NotChecked=0, Total=18360 [2021-11-25 18:00:42,913 INFO L87 Difference]: Start difference. First operand 6089 states and 7551 transitions. Second operand has 72 states, 72 states have (on average 3.513888888888889) internal successors, (253), 72 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)